Timing mechanism for boiler skimmers



Juiy 331, l @123.

F. EESERMAN ET AL.

TIMING MECHANISM FOR BOILER smMMERs Filed Sent. 6. 1921 4 Sheets-Sheet l zwwzw'azzs 7. 2

9-;- gal/WM W. CL.

F. EISEFIMAN ET AL.

TIMING MECHANISM FOR BOILER SKIMMERS Filed Sent. 6,

1921 4 Shets-Sheet '2 WWW.

F. EISERMAN ET AL TIMING MECHANISM FOR BOILER SKIMMERS Filed Sent. 6. 1921 4 sheets-sfi'eefi 5' July 31, 1923. 1,463.57?

- F. EISERMAN ET AL TIMING MECHANISM FOR BOILER SKIMMERS Filed Sent. @[1921 4 Sheets-Sheet 4 C I ff 9%xfWo 0 Z...

Patented July 31, 1923.

stares perica- 4.

FREIDBICK 'EISEBMAN, WILLIAM nrsnnn'eng AND H'EitMAn arsenals, on

CLEVELAND, OHIO.

TIMING MECHANISM FOR; BOILER SKIMMERS;

Application filed September a, 1921i seriarn'a. 498,943;

T all whom it may concern.

Be it known that we, FnnnRIoK EIsnRMAN, \VILLIAM EISERMAN, and HERMAN EIsnn-' Mam-citizens of the United States, residing at Cleveland, in the county of Cuyahoga and State of Uhio', have invented certain new and useful Improvements in Timing Mechanism for Boiler Skimmers, f which the following is a specification.

The use of what are known as boiler Skimmers is known in the art. These skimmers comprise one or more suction nozzles which are maintained-by floats-in a boiler in position just below the water level, and the nozzles communicate through suitable pipe fittings with an outlet pipe leading to waste, and this outlet pipe is provided with a valve which can be opened when desired, and when it is opened the boiler pressure forces out floating accumulations of scum and the like through the nozzles and the waste pipe, for the purpose of discharging from the boiler the scum and impurities referred to. i

The present invention relates to timing mechanism'for controlling the outlet valve,

and its efiectis to open saidvalve at stated intervals and for a certain period, say one minute every hour, and it includes electric motor operatively connected to the valve, the motor switch being controlled by a clock mechanism which may be set for the desired period;

The present apparatus may also include certain novel features with respect to the nozzles and the pipe connections thereto, and these features may form the subject of a separate application, the present case being confined to the timing mechanism and the combination thereof with the skimmer. It will be apparent,'however, that the present timing mechanism be applied to other types of shimmers, and no limitation in this respect is intended.

The invention is illustrated in the accompanying drawings in which Figure 1 is a' detail of a star wheel co'nstructionforming' part of the timingmechanism'. Fig. 9"is a section-.ontheline"9 9 of:Fig; 8.

In the drawings, 1 indicates a boiler the shell of which has an opening 2 through which extends a pipe united by a connection 3 toa special fitting 4 connected to ventbranches 5 to which are connected by a sys. tem of: rocking joints, pipes 7 leading to nozzles 12' which are supported by floats in such position that the elongated mouths of the nozzles willbe maintained inp'osition just below the water level,- the floats and nozzlesrisin-g and falling as thewater level changes. These parts are supported by standards 17 in the boiler.- Further description thereof is considered unnecessary, as

the details are immaterial to the present in vention. I

The waste or blow-off pi'pe-20commun'icate'swith the fittings above referred tO, and

may be provided with a valve branch 21 for taking samples, and with the controlling valve 23, and this pipe leads to'waste. The pipe is also providedwith the timing-*val ve 22" controlled by the mechanism K to be described, and this valve has a lever 24. J The casing for the timing mechanism' is ndi cate'dat- 25, supported by a'standa rd'26 l Vithinthe casing- 25 is a motor" 28 the shaft of whi'ch carries a; pinion 29mesh'ing with a' gear'30 the shaftf which is support ed'b'y a'stan'dard 3'1 and carriesa" bevel gear 32-mesl'1ing with the bevel gear 33 on a coun ter shaft-34 supportedby a standard 35*a nd carrying a" pinion 36 which'mesheswitlra larger spur gear 37 keyed to a sleeve 38 which carries an eccentric 39' the StraplO o f which is connected by an arm 41 to a lever 42 which carries pawl-- 43' pressed by a' spring 44% to engagern'ent with the ratchet wheel 45 back movement of which is re vented by" a pivoted dog 46' pressed by spring 47. The ratchet wheel iskeyedon'acounter shaft 418 su 'aported by standards 49 and 50 and carrying" a pinion- 5*1 which meshes with a spurg'ear 52" keyedto' a shaft a frame 62 having two walls 63 and 64 and supporting a casing 65 which encloses the clock mechanism.

This clock mechanism includes a spring winding lever 66 on a shaft 67 carrying a pinion 68 connected by a gear 69 to a pinion 71 on a shaft 72 of the clock driving spring barrel. 73 is a star wheel on a shaft 74 of the clock alarm mechanism and 75 is a shaft connected to the clock alarm spring barrel, said shaft 75 carrying a gear 76 which meshes with a gear 7 7 on a shaft? 8 carrying a lever arm 79. 80 is a crank arm on the shaft 7 5, connected to a link 81 by a pin 83 in a slot 82, the link 81 being connected to a switch lever 85 which co-operates with a switch S4 interposed between wires 86 leading, to a motor and wires 87 leading to a binding post block 88, to which the service leads 89 are connected. 91 is a link con necting the switch lever 85 and a lever 92 which is fulcrumed at 93 and has a free end 94 projecting in the indicated path 96 of travel of the pin 57 and the wheel 52.

The details of the clock mechanism for driving'the main spring shaft 72 and the alarm shaft 75 are not shown, as said shafts are well known and will be operated by any suitable clock mechanism.

In operation, as previously explained, the automatic valve actuating device indicated as a wholeat25 is adapted to open and close the valve 22 for a predetermined;period at regular intervals. The clock alarm gear when actuated by the clock alarm mechanism, turns the shaft 75 and the crank 80 causing the link 81 to shift the switch lever 85 to close the switch and start the motor 28. The pinion 29 on the motor shaft turns the gears 30, 32, 38, 36, and 37, the latter being keyed to the sleeve 38 on which the eccentric 39 is mounted. This causes reciprocation of the eccentric rod 11 and operates the ratchet which turns the shaft 48, pinion 51, gear 52 and shaft 58, which through the crank 54 swings the arm 2e andopcns the valve. The crank 54- turns approximately one B, P. M. through the reduction of the gears and the ratchet, and this speed may be varied by changing the gearing.

After the gear 52 starts from its initial position the pin 57 mounted on said gear travelsin the path 96 and strikes and depresses the lever 66 which winds the clock 1 driving spring. The pins 59 on the gear 52 next engage the star wheel 73 as shown in Flg. 8,'thereby turning the shaft 74- and resetting the clock alarm mechanism for the next skimming operation. As shown in the drawing the star wheel 73 has twelve teeth,

and the gear 52 carries ten pins, whereby thepinswill'turn the start wheeland its shaft 11/12 of a complete revolution thereby adjusting the time regulator one hour for r ward; At the next turn it will set it another hour forward, and so on. The star wheel acts to control the alarm mechanism and the pins operate the star wheel. By taking out an end pin 59 the intervals will be changed to two hours, and by taking out two" pins, three hours, etc.

The pin 57 next strikes and forces over the lever 79 which turns the gears 77 and 76 as above described, thereby winding the alarm spring. The slot 82 in the link 81 allows the pin 83 on the crank 80 on the shaft 75 to slidein the slot without throwing the switch out until the movement is com,- pleted. As the crank 54 and gear 52 com plete one revolution the pin 57 strikes the end 94 of the lever 92 the opposite end of which is connected by a link 91 to the switch lever 85, and as the lever 92 swings the switch is thrown open, thereby stopping the motor until the next period when the operation is repeated. i

It will therefore be apparent that at each operation of the timing mechanism the'motor is started and the flushing or vent valve 22 is opened and held open during one revolution of the controlling wheel 52, during the period of one minute in the embodiment described, and then the valve will be closed and the clock mechanism re-wound and reset for a similar operation at a predetermined time afterwards. When the valve is opened the boiler will force out the floating matter through the skimming nozzles and. pipe 20 to waste. The operation is automatic and is much superior tOllELllCl operation at variable intervals as heretofore practiced.

We claim:

1. In a timing mechanism for valves, the combination of an electric motor, a controlling wheel driven thereby and operatively connected to the valve, a clock mechanism controlling the motor circuit, andmeans automatically actuated by the rotation of the wheel to control the operation of the clock mechanism. i

2. In a timing mechanism for valves, the combination of an electric, motor, a controlling wheel driven thereby and operatively: connected to the valve, a clock mechanism controlling the motor circuit, and means all- I tomatically actuated by the rotation of the wheel to control the operationiof the clock mechanism, said clock mechanism including an alarm mechanism and means ,act-u: ated by the wheel to re-set the alarm mechanism for a succeeding operation.

3. in a timing mechanism for valves, the combination with a turning valve provided with a lever, a controlling wheel having a crank connected to said lever, an electric motor operatively connected to the wheel to drive the same, anda clock mechanism op-- eratively connected to the wheel and coin trolling the circuit of the motor.

4. In a timing mechanism for valves the combination of a motor, a controlling wheel driven by the motor and operatively connected to the valve, a second wheel, reduction gearing between the motor driven wheel and the second wheel, a clock mechanism controlling the motor circuit, and means automatically actuated by the second wheel to control and re-wind the clock mechanism for successive operations.

5. In a timing mechanism the combination of an operating electric motor, a clock mechanism controlling the circuit of the motor, and means actuated by the motor to control the clock mechanism and to re-wind the same for successive operations.

6. In a timing mechanism, the combination of a motor adapted to drive the member to be operated at intervals, a clock mechanism controlling the circuit of the motor, and means actuated by the motor and controlled by the clock mechanism to open and close the circuit of the motor and to rewind the clock mechanism at each operation of the motor.

'7. In a timing mechanism, the combination with a part to be intermittently operated, of an electric motor operatively connected to said part, a wheel driven by the motor, a clock mechanism. a. switch in the motor, a clock mechanism including an alarm mechanism, a switch in the motor circuit, means automatically actuated by said wheel to open the switch, means actuated by,

the clock mechanism to close the switch at stated intervals, and means actuated by said wheel to re-wind the clock mechanism at each operation, and means including a star wheel to operatively control the 'clockalarm mechanism, said star wheel engaged by pins on the before mentioned wheel. I

In witness whereof, we do affix our sig: natures in presence of two witnesses.

FREDRIGK EISERMAN. WILLIAM ,EISERMAN. HERMAN EISERMAN.

Witnesses:

JOHN A.BOMMHARDT, EDWARD J. HoBDaY. 

